If you watch a lot of news, you've seen Mark Glaze. He's the executive director of Michael Bloomberg's "Everytown for Gun Safety" organization and, every time there's a mass shooting, the gun-control group puts him out there to attack the 2nd Amendment. Glaze has always argued that many of the (almost universally) illegal guns used in these crimes could have been contained, if only we would diminish the rights of law-abiding Americans.